import java.util.Scanner;

public class Srting_10 {

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        System.out.println("请输入手机号");
        String tel = sc.next();


        String before=tel.substring(0,3);
        String end=tel.substring(7);

        String s=before+"****"+end;
        System.out.println(s);
    }
}
